Now showing items 392-411 of 1009

  • Handling exceptions in logic programming without negation as failure 

    Confalonieri R; Prade H; Nieves J (Springer Verlag, 2011)
    Default rules, i.e. statements of the form normally a's are b's, are usually handled in Answer Set Programming by means of negation as failure which provides a way to capture exceptions to normal situations. In this paper ...
  • Handling Inconsistencies Due to Class Disjointness in SPARQL Updates 

    Ahmeti A; Calvanese D; Polleres A; Savenkov V (Springer, 2016)
    The problem of updating ontologies has received increased attention in recent years. In the approaches proposed so far, either the update language is restricted to sets of ground atoms or, where the full SPARQL update ...
  • Handling uncertain user preferences in a context-aware system 

    Confalonieri R; Iñan H; Palau M (Springer Verlag, 2012)
    In context-aware systems, the representation of user profiles can greatly enhance the users' experience. User profiles often requires a compact and, at the same time, expressive language in order to represent conditional ...
  • Health-aware Food Recommender System 

    Ge, M; Ricci, F; Massimo, D (ACM, 2015)
    With the rapid changes in the food variety and lifestyles, many people are facing the problem of making healthier food decisions to reduce the risk of chronic diseases such as obesity and diabetes. To this end, our recommender ...
  • High performance query answering over DL-Lite ontologies 

    Rodriguez-Muro M; Calvanese D (AAAI Press, 2012)
    Current techniques for query answering over DL-Lite ontologies have severe limitations in practice, since they either produce complex queries that are inefficient during execution, or require expensive data pre-processing. ...
  • High-Level Surveillance Event Detection Using an Interval-Based Query Language 

    Helmer, S; Persia, F (IEEE, 2016)
    We propose a language based on relational algebra extended by intervals for detecting high-level surveillance events from a video stream. The operators we introduce for describing temporal constraints are based on the ...
  • Highlights on gender gap from Italian standardized assessment in mathematics 

    Bolondi G; Cascella C; Giberti C (Universita Karlova Press, 2017)
  • A 'historical case' of ontology-based data access 

    Calvanese, D; Mosca, A; Remesal, J; Rezk, M; Rull, G (IEEE, 2015)
    Historical research has steadily been adopting semantic technologies to tackle several recent problems in the field, such as making explicit the semantics contained in the historical sources, formalising them and linking ...
  • A Holistic Approach for Soundness Verification of Decision-Aware Process Models 

    de Leoni M; Felli P; Montali M (Springer Verlag, 2018)
    The last decade has witnessed an increasing transformation in the design, engineering, and mining of processes, moving from a pure control-flow perspective to more integrated models where also data and decisions are ...
  • How Can I Use This Method? 

    Moreno, L; Bavota, G; Di, Penta M; Oliveto, R; Marcus, A (IEEE, 2015)
    Code examples are small source code fragments whose purpose is to illustrate how a programming language construct, an API, or a specific function/method works. Since code examples are not always available in the software ...
  • How developers use the dynamic features of programming languages: The case of smalltalk 

    Callaú O; Robbes R; Tanter E; Röthlisberger D (ACM, 2011)
    The dynamic and reflective features of programming languages are powerful constructs that programmers often mention as extremely useful. However, the ability to modify a program at runtime can be both a boon-in terms of ...
  • How Developers' Collaborations Identified from Different Sources Tell us About Code Changes 

    Panichella, S; Bavota, G; Canfora, G; Antoniol, G; Di Penta, M (IEEE, 2014)
    Written communications recorded through channels such as mailing lists or issue trackers, but also code co-changes, have been used to identify emerging collaborations in software projects. Also, such data has been used to ...
  • How do API Changes Trigger Stack Overflow Discussions? A Study on the Android SDK 

    Linares-Vasquez, M; Bavota, G; Oliveto, R; Poshyvanyk, D; Di Penta, M (ACM, 2014)
    The growing number of questions related to mobile development in StackOverflow highlights an increasing interest of software developers in mobile programming. For the Android platform, 213,836 questions were tagged with ...
  • How do developers react to API evolution? the Pharo ecosystem case 

    Hora A; Robbes R; Anquetil N; Etien A; Ducasse S; Valente M (Institute of Electrical and Electronics Engineers Inc., 2015)
    Software engineering research now considers that no system is an island, but it is part of an ecosystem involving other systems, developers, users, hardware, ... When one system (e.g., a framework) evolves, its clients ...
  • How do software startups pivot? Empirical results from a multiple case study 

    Bajwa SS; Wang X; Duc AN; Abrahamsson P (Springer, 2016)
    In order to handle intense time pressure and survive in dynamic market, software startups have to make crucial decisions constantly on whether to change directions or stay on chosen courses, or in the terms of Lean Startup, ...
  • How Fuzzy is my Fuzzy Description Logic? 

    Borgwardt, S; Distel, F; Penaloza, R (Springer-Verlag, 2012)
    Fuzzy Description Logics (DLs) with t-norm semantics have been studied as a means for representing and reasoning with vague knowledge. Recent work has shown that even fairly inexpressive fuzzy DLs become undecidable for a ...
  • How item discovery enabled by diversity leads to increased recommendation list attractiveness 

    Ferwerda B; Graus MP; Vall A; Tkalcic M; Schedl M (ACM, 2017)
    Applying diversity to a recommendation list has been shown to positively inuence the user experience. A higher perceived diversity is argued to have a positive effect on the attractiveness of the recommendation list and a ...
  • How to Combine Visual Features with Tags to Improve Movie Recommendation Accuracy? 

    Deldjoo Y; Elahi M; Cremonesi P; Moghaddam FB; Caielli ALE (Springer, 2017)
    Previous works have shown the effectiveness of using stylistic visual features, indicative of the movie style, in content-based movie recommendation. However, they have mainly focused on a particular recommendation scenario, ...
  • How to improve the statistical power of the 10-fold cross validation scheme in recommender systems 

    Košir A; Odić A; Tkalčič M (ACM, 2013)
    At this stage development of recommender systems (RS), an evaluation of competing approaches (methods) yielding similar performances in terms of experiment reproduction is of crucial importance in order to direct the further ...
  • How to Stay Ontop of Your Data: Databases, Ontologies and More 

    Calvanese D; Cogrel B; Komla-Ebri S; Lanti D; Rezk M; Xiao G (Springer, 2015)
    Ontop is an Ontology Based Data Access system allowing users to access a relational database through a conceptual layer provided by an ontology. In this demo, we use the recently developed NPD benchmark (+4~billion triples) ...